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Hello everyone! Welcome back to programminginpython.com. I am continuing with this pattern programming series, here I will tell you how to print the pattern of the letter G. In the previous tutorials, I have shown you the patterns of letters A to F. Here it’s now time for Pattern G. You can check the complete series on letter patterns here.

Program on Github

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Print Pattern G – Code Visualization

Task:

Python program to print the pattern of letter G

Approach:

• Read an input integer for asking the size of the letter using input()
• Check if the entered number is greater than 8,
  • if yes, call the function print_pattern()
  • else, show a message to enter a number which is greater or equal to 8
• print_pattern()
  • here we only do two things, print star(*) and print space( ), just writing conditions so the pattern of *‘s and ‘s will display the pattern ‘G’
  • following are 5 conditions for printing *’s
    We have 2 loops, outer loop() for rows and an inner loop for columns.

    # Outer for loop
        for row in range(n): 
    
            # Inner for loop 
            for column in range(n):

    Print first row
    (row == 0 and (column != 0 and column != n-1)

    Print last row
    (row == n - 1 and (column != 0 and column != n-1))

    print first column
    ((column == 0 and (row != 0 and row != n-1))

    print last column
    (column == n-1 and row != n-1 and row >= (n/2)-1))

    print middle column
    (row == (n/2)-1 and ((n/2)-1 <= column < n-1))

  • print in remaining all cases.

Program on Github

Program:

__author__ = 'Avinash'

# Python3 program to print alphabet G pattern

#  * * * * *
# *
# *
# *     * * *
# *         *
# *         *
# *         *
#  * * * * *


def print_pattern(n):
    # Outer for loop for number of rows
    for row in range(n):
        # Inner for loop columns
        for column in range(n):
            # prints first row
            if ((row == 0 and (column != 0 and column != n-1)) or
               # prints last row
                (row == n - 1 and (column != 0 and column != n-1)) or
                # prints first column
                ((column == 0 and (row != 0 and row != n-1)) or
                 # prints last column
                 (column == n-1 and row != n-1 and row >= (n/2)-1)) or
                # prints middle column
                (row == (n/2)-1 and ((n/2)-1 <= column < n-1))
            ):
                print("*", end=" ")
            else:
                print(" ", end=" ")
        print()

size = int(input("Enter size: \t"))

if size < 8:
    print("Enter a size greater than 8")
else:
    print_pattern(size)

Output:

Program on GitHub

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